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प्रश्न
Elements have been arranged in the following sequence on the basis of their increasing atomic masses.
| F, | Na, | Mg, | Al, | Si, | P, | S, | Cl, | Ar, | K |
- Pick two sets of elements which have similar properties.
- The given sequence represents which law of classification of elements?
उत्तर
- Sodium, magnesium aluminium and potassium are all metals while fluorine, phosphorus, sulphur, chlorine and argon are all non-metals.
- The given sequence represents Mendeleev's law of periodicity.
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संबंधित प्रश्न
Answer the following in respect of element `31/15 P`
Give its electronic configuration
Which is greater in size an atom or a cation?
Write the name and symbol of the element from the description.
The atom having the smallest atomic mass.
Among the elements of the second period, Li to Ne, pick out the element with the largest atomic size
Fill in the blanks.
Size of the atoms ______ from left to right across a period and ______ on descending in a group of normal elements.
Moving from left to right, the size of the atom decreases.
Write information about the given atomic numbers in the table. 10, 20, 7.
| Atomic Number | Electronic configuration | Group | Period | Element |
| 10 | ||||
| 20 | ||||
| 7 |
Which of the following gives the correct increasing order of the atomic radii of O, F and N?
Which among the following elements has the largest atomic radii?
Arrange the following in order of increasing radii:
Cl−, Cl
Explain your choice.
